The cart is initially at rest. Force
1 answer:
Answer:
Explanation:
Given that,
Initial speed of the cart, u = 0
Let F force is applied to the cart for time after which the car has speed v. The force on an object is given by :
F = ma
m is the mass of the cart
We need to find the speed of second cart, if the same force is applied for the same time to a second cart with twice the mass. Force becomes,
So, the speed of second cart is half of the initial speed of first cart. So, the correct option is (b).
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<h2>Answer :</h2>
□ The Final velocity of body = 45 m/s
Initial velocity of body = 0 m/s
Acceleration of body = 3 m/s²
Time taken by body = 15 sec
<h2>To Calculate :</h2>Final velocity of body = ?
<h2>How To Calculate ?</h2><h3>❒ </h3>Here in this question we are provided that a body is in rest so it's initial velocity will be 0 m/s (because from rest), Acceleration of body is 3 m/s², and Time taken is also given which is 15 sec.
<h3>❒</h3>To calculate the Final velocity of body we'll use the first equation of motion which says v = u + at
Where,
- v is the Final velocity in m/s.
- u is the Initial velocity in m/s.
- a is the Acceleration in m/s².
- t is the Time taken in second.
From first equation of motion
- ⇒ v = u + at
- ⇒ v = 0 + 3 × 15
- ⇒ v = 0 + 45
- ⇒ v = 45
Hence, the Final velocity of body is 45 m/s.